My gf is dating somone else....and is avoiding me now.....how do i get.and attract her back to me??

my gf of one yr nd me are in a long dstance relaship..and we deiced tht we wuld date smeone else for timbieng but will get together wen i return..coz its a tru luv & dun wana loose echotha.. but frm few dys after she got a bf..she s behavng in a diff way..she sys she wnts time coz of so mny resons..lik stdies & hr mom gtting serius abt her contct wid guys ..& she keps avodng me by wen eva i sign in...she signs out...she tlls that she dint know that i signed in .or the current wnt off and all...she also says her mom dsent want her to chat.coz shs not doin gud at skool..& her mom getting suspcious and ****...i mean all dis reaosns r soo lame..arent they?.. her mom tkes her to movies alows her to go watch tons of movies and hang out wid hr frnds and all..but wen it come to chat she can chats only once a week only fer half an hour...my quest is,is she gtting serious abt her new luv or is she bored of me..or is she really sying the trut? i reall luv her.& want her bck..plz help.wat to i do?